Fuel-delivery system.



J. ZAGORA.

FUEL DELIVERY SYSTEM.

APPLICATION FILED AUG. 28, 1918.

Patented Aug. 4, 1914,

Q vi/Mwmco GH'DZHGIJO UNITED STATES PATENT OFFICE.

JOSEPH ZAGORA, OF RACINE, WISCONSIN.

FUEL-DELIVERY SYSTEM.

To all whom it may concern Be it known that I, JOSEPH ZAGORA, a citizenof the United States, residing'at Racine, in the county of Racine andState of (Visconsin, have invented certain new and useful Improvementsin F uel-Delivery Systems; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to improvements in fue deliverysystems formotors.

One object of the invention is 'to provide a fuel delivery system havingan auxiliary supply tank and improved means for con trolling theoverflow therefrom without interfering with the operation of the fuelpump of the system.

Another object is to provide a fuel delivery system in which thenecessity of connecting the overflow of the auxiliary tank with the naintank is obviated thus dispensing With the use of the usual long returnor overflow pipes.

With these and other objects in view, the invention consists of certainnovel features of construction and the combination and arran ement ofparts as will be more fully descri%ed and claimed.

In the accompanying drawings is shown a diagrammatic view of my improvedfuel supplysystem. 1

Referring more particularly to the drawing, 1 denotes the main fuelsupply tank, 2 denotes the auxiliary supply tank, 3 denotes the pump and4 denotes the carbureter of the fuel supply system to which myimprovements are applied.

The auxiliary tank 2 is connected by a pipe 5 to the fuel pump 3 and thelatter is connected by a fuel conducting pipe 6 to the main supply tank1 which may be located at any desired point with respect to theauxiliary tank and carburetor of the system. The auxiliary tank 2 isconnected by a fuel supply pipe 7 with the carbureter 4 and said pipe 7has on the end thereof in the auxiliary tank 2, a strainer 8 of theusual or any suitable construction.

The auxiliary tank 2 is provided with an overflow pipe 9 which extendsupwardly to a point near the upper end thereof and t 1s connected at"its outer end with the fuel conducting pipe 6 a short distance from theconnection of the latter with the pump 3 as Specification of LettersPatent.

Application filed August 28, 1913.

Patented Aug. 4, 1914. Serial No. 787,191.

shown. In the upper end of the auxiliary tank is an opening 10 which isnormally closed by a hollow cap 11 having a centrally disposed air vent12 around the inner end of which and projecting downwardly from theinner side of the cap is a valve seat 13. On the upper end of theoverflow pipe 9 or the end within the tank 2 is also formed a valve seat14 with which is normally engaged a valve 15 connected to and operatedby a float 16 arranged above the end of the pipe 9 and which islifted-by the fuel in the tank when said fuel reaches a point above theupper end of the pipe 9. The valve 15 is provided with a stem 17 whichextends upwardly through the float and through the valve seat and airvent 12 in the cap 11. The opposite end of the valve stem 17 extendsbeyond the valve 15 and projects into the upper end of the overflow pipe9. On the projecting upper end of the valve stem 17 above the float 16is arranged a vent closing valve 18 which is designed to engage thevalve seat 13 and to thus prevent the fuel from the tank 2 fromoverflowing through the vent should the pipe 9 for any reason becomeclogged or the fuel enter the tank 2 faster than it can be dischargedthrough-the overflow pipe.

The pump 3 comprises a cylinder 15) open at its ends and having on oneend right angular oppositely projecting extensions 20 and 21 which areopen at their ends and threaded internally to receive coupling members22. WVith the coupling member 22 in the extension 20'is connected theouter end of the supply pipe 5, While the coupling 22 in the extension21 is connected with the fuel conducting pipe 6. In the coupling member22 of the extension 20 is arranged a valve seat 23 with which is engageda check valve 24. In the coupling member 22 of the extension 21 isarranged a valve seat 25 with which is engaged a check valve 26.

The valves 24 and'2G are arranged to open which bears against theflanged end of the head 31 of the piston and when revolved by the shaft35 projects the piston into the cyllnder against the pressure andresistance of the spring 341, but as this pump forms no 'part of thepresent invention, it will not be further described.

In the operation of my improved auxiliary tank motor fuel delivery, thevalve 15 carried by the float 16 will normally engage the valve seat 14on the upper end of the overflow pipe and will prevent the air in. theauxiliary tank from entering the pipes 9 and 6 and interfering with theoperation of the pump 3 while the auxiliary tank is being filled. As thefuel inthe tank 2 rises to a certain point,.tl1e float 16 will be raisedand the valve 15 thus disengaged from the valve seat 1 1 and the upperend of the overflow pipe uncovered thus permitting the fuel --in theauxiliary tank to overflow through the pipe 9. Should the fuel in theauxiliary tank continue to rise in the tank faster than it overflowstherefrom, the float 16 will be further raised until the valve 18 fuelfrom overflowing preventing the By connecting the overthrough the vent.

' flow pipe 9 with the fuel supply pipe 6 as herein shown and described,instead of connecting the same with the main tank 1, as is the usualcustom the necessity for providing a long return overflow pipe isobviated and much better results are obtained because in the long returnor overflow pipes the flow of the return fuel from the auxiliary tankoften becomes sluggish and interferes with the proper operatiton of thesystem.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Having thus described my invention, what I claim is:

1. In a fuel 'delivery system for motors,

the combination with a main supply tank, of an auxiliary tank, a fuelconducting pipe connecting said supply tank with said auxiliary tank, apump connected to said fuel conducting pipe to lift the fuel from themain tank to the auxiliary tank, an overflow pipe connected at its outerend with said fuel conducting pipe adjacent to the inlet end of saidpump and having its opposite end extending upwardly in and to near theupper end of said auxiliary tank, a valve seat on the end of saidoverflow pipe, a float arranged in said auxiliary tank, a valve carriedby said float and adapted to engage said valve seat and to close the endof the overflow pipe until the float is lifted by the rising of fuel inthe auxiliary tank, a cap arranged on the upper endof said auxiliarytank and having therein an airvent, and means carried by the float toclose said vent when the float is raised.

2. In a fuel delivery system for motors, the combination with a mainfuel supply tank, of an auxiliary tank, a fuel conducting pipe toconnect said main tank with said auxiliary tank, a pump arranged in saidfuel conduct-ing pipe, an'overflow pipe connected at its outer end withsaid fuel conducting pipe near the inlet end of said pump and having itsopposite end extending upwardly in and to near the upper end of saidauxiliary tank, a valve seat-on the! upper end of said pipe, a floatarranged in said auxiliary tank and having connected therewith a valvestem, said stem projecting above and below the float and havin its lowerend engaged with the upper end of the overflow pipe, a valve on said endof the valve stem to engage the seat in the upper endof said overflowpipe whereby'the latter-is closed, a cap on said auxiliary tank andhaving therein an air vent, a valve seataround the lnner end of saidvent, a valveon the upper end of said stem to engage said seat andthereby close said vent, a carbureter,and a fuel supply pipe to connectsald carbureter with said auxiliary tank.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

JOSEPH ZAGORA. Witnesses:

CHRISTIAN JoHNsoN HAROLD JOHNSON.

